Theoretical Investigation on the Impact of Injection Parameters on the Combustion Process Based on an Opposed-Piston Diesel Engine

  • LIANG Yongsen ,
  • ZUO Zhengxing ,
  • WANG Wenxiao ,
  • LI Hong ,
  • LIU Long ,
  • WU Jie ,
  • WU Mindong ,
  • WANG Xinghao
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  • 1. School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
    2. College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China
    3. China North Engine Research Institute, Tianjin 300400, China

网络出版日期: 2025-05-06

基金资助

The authors appreciate the financial support from Diesel Engine Development Project

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025

Theoretical Investigation on the Impact of Injection Parameters on the Combustion Process Based on an Opposed-Piston Diesel Engine

  • LIANG Yongsen ,
  • ZUO Zhengxing ,
  • WANG Wenxiao ,
  • LI Hong ,
  • LIU Long ,
  • WU Jie ,
  • WU Mindong ,
  • WANG Xinghao
Expand
  • 1. School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
    2. College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China
    3. China North Engine Research Institute, Tianjin 300400, China

Online published: 2025-05-06

Supported by

The authors appreciate the financial support from Diesel Engine Development Project

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025

摘要

本研究从理论层面探讨了喷油器和喷孔布置、喷雾锥度及喷孔尺寸对水平对置二冲程发动机燃烧与排放特性的影响。通过数值模拟方法,系统研究了上述参数变化对发动机性能与排放的影响规律。研究结果表明:喷油器喷孔布置的优化设计对改善燃油空间分布与雾化效果具有关键作用,可有效提升指示热效率与指示平均有效压力;但需注意的是,虽然HC、碳烟和CO排放可通过喷油器布置形式控制在较低水平,NOx排放却呈现相对升高趋势。研究还揭示了喷雾锥角对燃烧过程的动态影响机制:当喷雾锥角处于最优值时,燃油分布与碰壁效应达到最佳平衡,此时指示热效率与指示平均有效压力均达到峰值。此外,喷孔直径对燃烧与排放控制具有双重调控作用,优化后的孔径不仅能提升热效率,还能在一定程度上降低碳烟、HC、CO及CO2的排放水平。本研究成果为水平对置二冲程发动机的性能优化与排放控制策略提供了重要理论依据,对该领域的后续研究和技术开发具有指导意义。

本文引用格式

LIANG Yongsen , ZUO Zhengxing , WANG Wenxiao , LI Hong , LIU Long , WU Jie , WU Mindong , WANG Xinghao . Theoretical Investigation on the Impact of Injection Parameters on the Combustion Process Based on an Opposed-Piston Diesel Engine[J]. 热科学学报, 2025 , 34(3) : 756 -770 . DOI: 10.1007/s11630-025-2142-1

Abstract

This study delves into the theoretical exploration of the effects of injector and orifice arrangement, spray angle, and orifice size on combustion and emission characteristics of horizontal opposed two-stroke engines. By employing numerical simulations, the research systematically investigates how variations in these parameters influence engine performance and emissions. The findings underscore the significance of injector and orifice configuration in optimizing fuel spatial mixing and atomization, resulting in improved indicated thermal efficiency and indicated mean effective pressure. However, it is noted that while emissions of HC, Soot, and CO can be maintained at low levels by injector and orifice configuration, NOx emissions tend to be relatively higher. Moreover, the study highlights the impact of spray angle on combustion dynamics, where an optimum spray angle is identified for achieving peak thermal efficiency and effective pressure due to the improvement between spray distribution and impingement. Additionally, the study reveals the critical role of nozzle diameter in combustion and emissions control, with an optimal diameter leading to enhanced thermal efficiency and reduced emissions of Soot, HC, CO, and CO2 to some extent. Overall, these findings offer valuable insights into optimizing engine performance and emissions control strategies in horizontal opposed two-stroke engines, guiding future research and development efforts in the field.

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